Speakers
Description
Signatures from departures away from the standard model of cosmology justify the search for extended models of gravity. The full shape data from DESI DR2 will provide enhanced precision to test the growth of structure, valuable to constraints extensions beyond the standard model of gravity. We develop a new EFT pipeline for phenomenological tests of gravity, providing a framework for constraining modifications of gravity using full-shape of galaxy clustering. The code implements a 1-loop correction method particularly sensitive to scale-dependent modifications in the growth of structure for both power spectrum and bispectrum, while retaining a high-speed that is suitable for state-of-the-art Stage-IV surveys, including both phenomenological approaches and the Horndeski effective field theory basis.
We perform extensive validation of the analysis pipeline against realistic galaxy mock catalogues in both ΛCDM and modified gravity scenarios, demonstrating its ability to recover unbiased cosmological parameters across a wide range of models while dealing with projection effects. These improvements establish a robust and accurate methodology for testing gravity with spectroscopic large-scale structure data.